.page-contact {
  --contact-line: rgba(30, 107, 96, 0.34);
  --contact-frame: rgba(27, 25, 23, 0.2);
  --contact-line-inv: rgba(243, 238, 226, 0.18);
  --contact-tint: #FBF7EC;
  background: var(--cream);
  color: var(--deep);
}

.page-contact .board {
  padding: clamp(44px, 6vw, 78px) 0;
}

.page-contact .figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding: clamp(22px, 4vw, 44px) 0 clamp(34px, 5vw, 62px);
}

.page-contact .contact-hero .breadcrumbs {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-contact .contact-hero__text {
  min-width: 0;
}

.page-contact .contact-hero .eyebrow {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--deep-teal);
  margin: 0 0 14px;
}

.page-contact .contact-hero h1 {
  margin: 0 0 20px;
}

.page-contact .contact-hero .lead {
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
}

.page-contact .contact-hero__meta {
  list-style: none;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--contact-frame);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--slate);
}

.page-contact .contact-hero__meta li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-contact .contact-hero__figure {
  margin: 0;
  border: 1px solid var(--contact-frame);
  background: var(--paper);
  min-width: 0;
}

.page-contact .contact-hero__figure .figure__media {
  overflow: hidden;
}

.page-contact .contact-hero__figure .figure__cap {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate);
  padding: 10px 14px 12px;
  border-top: 1px solid var(--contact-frame);
}

/* ---------- 画板栏头 ---------- */
.page-contact .board-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding-bottom: 18px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--contact-frame);
}

.page-contact .board-num {
  font-size: 13px;
  color: var(--deep-teal);
  border: 1px solid var(--contact-line);
  padding: 2px 7px;
  line-height: 1.4;
  flex: 0 0 auto;
}

.page-contact .board-title {
  margin: 0 0 6px;
}

.page-contact .board-kicker {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-contact .board-intro {
  max-width: 66ch;
  margin: 0 0 clamp(26px, 4vw, 40px);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 渠道 ---------- */
.page-contact .channels-grid {
  display: grid;
  gap: clamp(30px, 4vw, 52px);
}

.page-contact .channel-list {
  min-width: 0;
}

.page-contact .channel {
  border: 1px solid var(--contact-line);
  background: var(--cream);
  padding: 20px 18px 22px;
  min-width: 0;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-contact .channel + .channel {
  margin-top: 16px;
}

.page-contact .channel:hover,
.page-contact .channel:focus-within {
  border-color: var(--deep-teal);
  background: var(--contact-tint);
}

.page-contact .channel__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.page-contact .channel__num {
  flex: 0 0 auto;
  font-size: 12.5px;
  color: var(--celadon);
  border: 1px solid var(--contact-line);
  padding: 1px 6px;
  line-height: 1.5;
}

.page-contact .channel__title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.01em;
}

.page-contact .channel__value-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-bottom: 14px;
}

.page-contact .channel__value {
  font-size: 15.5px;
  letter-spacing: 0.02em;
  color: var(--deep);
  word-break: break-all;
  min-width: 0;
}

.page-contact .contact-copy {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  padding: 6px 11px;
  border: 1px solid var(--contact-line);
  background: transparent;
  color: var(--deep-teal);
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .contact-copy:hover {
  background: var(--deep-teal);
  border-color: var(--deep-teal);
  color: var(--cream);
}

.page-contact .contact-copy:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-contact .channel__body {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
}

.page-contact .channel__meta {
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px dashed var(--contact-frame);
  display: grid;
  gap: 8px;
  font-size: 14px;
}

.page-contact .channel__meta div {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px;
}

.page-contact .channel__meta dt {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
  letter-spacing: 0.04em;
  padding-top: 2px;
}

.page-contact .channel__meta dd {
  margin: 0;
  line-height: 1.75;
  color: var(--deep);
}

/* ---------- 反馈材料 ---------- */
.page-contact .materials-panel {
  min-width: 0;
  border-top: 2px solid var(--ink);
  padding-top: 20px;
}

.page-contact .materials-figure {
  margin: 0 0 20px;
  border: 1px solid var(--contact-frame);
  background: var(--paper);
}

.page-contact .materials-title {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-contact .materials {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  border-top: 1px solid var(--contact-frame);
}

.page-contact .materials li {
  border-bottom: 1px solid var(--contact-frame);
}

.page-contact .material {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 2px;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease);
}

.page-contact .material:hover {
  background: var(--contact-tint);
}

.page-contact .material input[type="checkbox"] {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  accent-color: var(--deep-teal);
  cursor: pointer;
}

.page-contact .material input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-contact .material__text {
  font-size: 15px;
  line-height: 1.75;
  min-width: 0;
}

.page-contact .material__text strong {
  display: inline-block;
  margin-right: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--deep-teal);
}

.page-contact .material input[type="checkbox"]:checked + .material__text {
  color: var(--slate);
}

.page-contact .materials-note {
  margin: 0;
  padding: 14px 14px 16px;
  border-left: 2px solid var(--celadon);
  background: var(--paper);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 响应流程 ---------- */
.page-contact .flow-board {
  background: var(--ink);
  color: var(--cream-inv);
}

.page-contact .flow-board .board-head {
  border-bottom-color: var(--contact-line-inv);
}

.page-contact .flow-board .board-num {
  color: var(--celadon);
  border-color: var(--contact-line-inv);
}

.page-contact .flow-board .board-kicker,
.page-contact .flow-board .board-intro {
  color: var(--pale-slate);
}

.page-contact .flow-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-contact .flow-step {
  position: relative;
  margin-left: 6px;
  padding: 0 0 26px 30px;
  border-left: 1px solid var(--contact-line-inv);
  transition: opacity var(--dur) var(--ease);
}

.page-contact .flow-step:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-contact .flow-step:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 4px;
}

.page-contact .flow-step__dot {
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--celadon);
  transition: background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .flow-step:hover .flow-step__dot,
.page-contact .flow-step:focus-visible .flow-step__dot {
  background: var(--orange);
  transform: scale(1.2);
}

.page-contact .flow-step__num {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--celadon);
  margin-bottom: 6px;
}

.page-contact .flow-step__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--cream-inv);
}

.page-contact .flow-step__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(243, 238, 226, 0.82);
  max-width: 34ch;
}

/* ---------- 纠错与合作 ---------- */
.page-contact .contact-pair {
  display: grid;
  gap: 30px;
}

.page-contact .pair-block {
  min-width: 0;
  border-top: 1px solid var(--contact-frame);
  padding-top: 18px;
}

.page-contact .pair-block__kicker {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-contact .pair-block__title {
  margin: 0 0 12px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-contact .pair-block p {
  font-size: 15px;
  line-height: 1.85;
  margin: 0 0 14px;
}

.page-contact .pair-block__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}

.page-contact .text-link {
  color: var(--deep-teal);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.01em;
  text-decoration: none;
  border-bottom: 1px solid var(--contact-line);
  padding-bottom: 2px;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-contact .text-link:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.page-contact .text-link:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

/* ---------- 登记信息 ---------- */
.page-contact .registry-frame {
  border: 1px solid var(--contact-frame);
  background: var(--paper);
  padding: clamp(22px, 4vw, 38px);
  font-size: 15px;
}

.page-contact .registry-title {
  margin: 0 0 20px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-contact .registry-list {
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--contact-frame);
}

.page-contact .registry-list div {
  display: grid;
  grid-template-columns: minmax(0, 96px) minmax(0, 1fr);
  gap: 10px;
  padding: 11px 0;
  border-bottom: 1px solid var(--contact-frame);
}

.page-contact .registry-list dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate);
  padding-top: 3px;
}

.page-contact .registry-list dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  word-break: break-word;
}

.page-contact .registry-list dd.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  font-size: 14px;
}

.page-contact .registry-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--deep);
  max-width: 70ch;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
  }

  .page-contact .contact-hero .lead {
    font-size: 17px;
  }

  .page-contact .channel__title {
    font-size: 19px;
  }

  .page-contact .contact-pair {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 44px;
  }

  .page-contact .registry-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }

  .page-contact .registry-list div:nth-last-child(2) {
    border-bottom: 1px solid var(--contact-frame);
  }
}

@media (min-width: 900px) {
  .page-contact .channels-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: start;
  }

  .page-contact .board-head {
    gap: 22px;
    padding-bottom: 20px;
    margin-bottom: 26px;
  }

  .page-contact .flow-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 8px;
  }

  .page-contact .flow-step {
    margin-left: 0;
    padding: 30px 26px 0 0;
    border-left: none;
    border-top: 1px solid var(--contact-line-inv);
  }

  .page-contact .flow-step:last-child {
    border-top-color: var(--contact-line-inv);
    padding-bottom: 0;
  }

  .page-contact .flow-step__dot {
    left: 0;
    top: -5px;
  }

  .page-contact .flow-step__note {
    max-width: 30ch;
  }
}

@media (min-width: 1180px) {
  .page-contact .channel {
    padding: 24px 26px 26px;
  }

  .page-contact .channel__body {
    font-size: 15.5px;
  }
}